Battery Charge regulator from Alternator

I came across two great component which can be used to rectify(Alternator's ac input) and to regulate using IC "LTC 4412" from Linear technology & MOSFETs from "International rectifier".

But I concerned about Voltage supply to IC, Vin ??

Can anyone please suggest me how to take it forward. I am looking for suggestions on making IC LTC 4412 safe in this application so that it may gate the MOSFET well in order to regulate battery voltage.